// Copyright 2022 The CubeFS Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.

package largefile

type LogCloser interface {
	Close() error
	Log([]byte) error
}

type largeLogger struct {
	l LargeFile
}

func OpenLargeFileLog(cfg Config, rotateNew bool) (r LogCloser, err error) {
	f, err := OpenLargeFile(cfg)
	if err != nil {
		return
	}
	if rotateNew {
		if err = f.Rotate(); err != nil {
			return
		}
	}
	return &largeLogger{l: f}, nil
}

func (r *largeLogger) Log(msg []byte) (err error) {
	if msg[len(msg)-1] != '\n' {
		msg = append(msg, '\n')
	}
	_, err = r.l.Write(msg)
	return
}

func (r *largeLogger) Close() (err error) {
	return r.l.Close()
}
